Is one who rejects the official explanation provided for September 11, 2001. They include professional architects and engineers, scientists, and other scholars, firefighters, pilots, veterans, doctors, the victims families and people from countless other walks of life. People who reject the official explanation live in a paradigm that sees the mainstream media as a tool of manipulation for the masses.

Architects and Engineers for 9-11 truth are the quintessential truthers.

A "truther" is somebody that confuses nutters, rightwingers, republicans, Hannity, Beck, O'Rielly FOX News pundits etc., by telling them the truth. Such is their nature when telling them the truth and rebutting their lies.

President Bush had a blank confused look on his face when a truther told him there were no WMD's in Iraq.